Pump.



. B. HEWITT.

PUMP.

APPLICATION FILED JUNE I2, 1912.

Patented May 23, 1916.

. UNITED STATES PATENT OFFICE.

WILLIAM! B. HEWITT, or HoLYoKE, MASsAcHUsETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, To WORTHINGTON rumr AND MACHINERY conroaATIoN, or NEW YORK,

N. Y., A CORPORATION OF VIRGINIA.

, PUMP.

To all whom it may concern Be it known that I, WILLIAM B. HEWITT, acitizen of the United States, residing at Holyoke, county of Hampden, and State of Massachusetts, have invented certain new and useful Improvements in Pumps, fully described and represented in the following specification and; the accompanying drawings, forming a part of the same.

This invention relates to. 'an improved pump of that class of single double acting pumps designed especially for the use of farmers, stockraisers and the like. Such pumps should be simple and rugged in construction, low in cost of manufacture and operation, fitted for intermittent use, convenient for packing and repair, and provide for convenient repacking and replacement of valves without skilled labor. Such pumps have heretofore been of the inside packed piston pattern, in which the piston is not readily accessible for repairs or repacking, and leakage is impossible of observation without removal of parts. The volumetric efliciency of these pumps, therefore is very low after short service and the power used for work done excessive. For cheapness of construction, also, it has been the custom to make many bearings non-adjustable, which afi'ects the life and efficiency of the machine.

The especial object of the present invention is to provide a simple, strong, cheap and durable pump having outside packed plungers, readily accessible for observation of leakage and for repacking,

' inaccessible interior parts required to be adjusted or renewed shall be avoided and by which high efiiciency and low costof manufacture, operation and up-keep shall be attained.

In the accompanying drawings forming a part of this specification, a pump of the preferred form embodying all the features of the invention is shown, and this construe.- tion will now be described and the features forming the invention then specifically pointed out in the claims. I

In the drawings, Figure 1 is a side elevation of the pump. Fig. 2 is an end elevation Specification of Letters Patent.

and in which Patented May 23, 1916.

Application filed June 12, 1912. Serial No. 708,135.

of the pump. Fig. 3 is a vertical central sect1on longitudinally, of the pump plungers, Fig. 4 is a detail transverse sectional view through the discharge chamber.

Referring to the drawings, A A are the pump cyhnders forming the opposite ends of the double acting pump, B B the pump plungers, C the pulsation chambers and. passages, D the suction chamber connected w1th suction pipe E, F the discharge chamber connected with discharge pipe G, H the discharge air chamber, a the suction valves and b the discharge valves. The suction and discharge may be at either side of the pump. The plungers B are outside packed after long periods of disuse. A dripping pan or basin N preferably extends below the packing 10 and cross heads, arranged to catch all leakage from the external stufiing'boxes and oil from the bearings, so that the pump is suitable for house operation.

In the smaller sizes, the pump may and preferably will be constructed as shown, that is, with the drip pan, pump cylinders, pulsation and suction chambers, and the suction valve plate integral, thus providing a very simple, cheap and strong construction. In the larger sizes, however,'the pumps may be formed intwo or more pieces and cast and assembled in any suitable manner. The discharge valves 72 are carried in a separate plate 15 above the suction valves, as shown,

and the discharge chamber'F and air chamber H are preferably formed integral as a cover over the discharge valves, the. cover and discharge valve plate being secured to the pump in any suitable manner, being shown as bolted in slotted openings.

convenient access to and replacement or repair of all parts liable to require this, and is admirably fitted for use where the attention of a skilled engineer or machinist stantially horizontal is not available. Both the suction and discharge valves may readily be removed and replaced without disconnecting the suction or discharge pipe from the pump, so that these connections are permanent and are not interfered with by valve replacement.

It will be understood that.the invention is not limited to the special center crank arrangement or special form of valves shown, but that these parts, as well as other details of the construction, may be varied while retaining the invention defined by the claims.

What I claim is:

1. A pump having a base carrying subopposed cylinders forming the pump chambers, outside packed pump plungers in said'cylinders connected together at their adjacent ends, a central power operating crank shaft and crank for actuating said plungers, pulsation passages extending upward and inward from the outer ends of the pump cylinders, and suction and discharge chambers located in line and carried by the inner ends of the pulsation passages.

2. A pump having a base carrying opposed cylinders forming the pump chambers, outside packed pump plungers in said cylinders connected together at their adjacent ends, a central power operating crank shaft and crank, pulsation passages extending upward and inward from the opposite ends of the pump and forming a frame open on the sides above the pump cylinders, suction and discharge chambers carried by the adjacent ends of the pulsation passages above the pump plungers, and valves in said suction and discharge chambers.

3. A pump having a base carrying opposed cylinders forming the pump chambers, outside packed pump plungers in said cylinders and in alinement with each other, each plunger having an integral yoke member at its outside end, means for connecting said yoke members to form a yoke, a cen- I tral power-operating crank-shaft and crank, said crank engaging the yoke, pulsation pascent ends, a central power operating crank shaft and crank for actuating said plungers, pulsation passages extending upward and inward from the opposite ends of the pump and forming a frame open on the sides above the pump cylinders, suction and pulsationchambers carried by the adjacent ends of the pulsation passages above the pump plungers, a removable discharge valve .plate on the pulsation chamber above the suction valves and a removable cover forming a discharge chamber above the discharge valves.

' 5..A pump having a base carrying opposed cylinders, forming the pump chambers, outside packed pump plungers in said cylinders connected together at their .adjacent ends, a central power operating crank shaft and crank for actuating said plungers,

pulsation passages extending u ward and inward from the opposite ends 0 the pump and forming a frame open on the sides above the pump cylinders, suction and pulsation chambers carried by the adjacent ends of the pulsation passages above the pump plungers, suction anddischarge pipe connections carried by the pulsation passages, a removable discharge valve plate on the pulsation chamber above the suction valves and a removable cover forming a discharge chamber above the discharge valves and having a passage extending downwardly outsidethe pulsation chamber to the discharge pipe.

- 6. A pump having a base forming the drip pan N, opposed cylinders A on said base forming the pump chambers, outside packed pump plungers B in said cylinders carrying inner cross heads I connected together, sliding block K between said cross heads, crank shaft L carrying crank 11 actuating said block, pulsation passages C extending upward and inward from the tion chamber D and discharge chamber F above the pump plunger's, and carried by the inner ends of pulsation passages C, said base, pump cylinders, pulsation passages 10 and suction chamber being formed. integral.

In testimony whereof, I have hereunto set my hand, in the presence of'two subscribing Witnesses.

WILLIAM B. HEWITT. Witnesses:

FRITZ GIEHLER, F. J. NEWCOMB. 

